Centertonix is the Cotuit Center for the Arts a cappella group. This exciting ensemble includes a variety of ages and vocal talents, and is prepared to entertain you with jazz, show tunes, pop, and doo-wop numbers. Their beautiful sound is sure to delight.

Under the musical direction of Steve Stein, Centertonix began meeting in March 2017. They debuted at the Cotuit Center’s Derby Day Celebration two months later. They have since performed at various venues throughout Cape Cod.

Centertonix presents harmony from a wide range of styles and eras. This is a group of talented a cappella singers whose mission is to entertain with an inspiring sound and to educate audiences about the wide variety of a cappella genres.

The ensemble is available to share their love of harmony and knowledge of a cappella history. Their excitement, energy, and talent can be hired for your performance venue, speakers’ series, private party, retirement community, and organization’s activity.

Find the group at Follow Centertonix on Facebook! Subscribe to the Centertonix YouTube channel!

Rehearsals are Tuesday evenings from 6:30 - 9:00 PM. Auditions are ongoing with admittance based upon the talent of the auditionee and the specific vocal needs of the group.

Please contact Centertonix artist manager Idell Stein at for information.

Meet the Group

William Ball - (Bill) –Tenor – Semi-retired and living in East Falmouth with his artist wife Barbara, enjoying time with their sons Ryan/Michael and other local loving family. At 18 he attended the American Academy of Dramatic Arts in NYC and later the University of Bridgeport. where he was awarded the Royal Academy of Dramatic Arts medal for his theatrical roles including leads in Company, Greasepaint, Godspell and Side by Side. He then earned his MBA from UCONN and spent 25+ years in consulting and Ops/IT management. During that time, he sang with local, church and regional choirs including the Hartford City Singers, Tanglewood Festival Chorus, Canton Choral Society and the Falmouth Chorale.

Aimee Champagne is a student in Sandwich public schools. Aimee has performed in school plays and musicals for a few years. She has also performed in shows at the Cotuit Center for the Arts. Aimee started singing from an early age in church. This is her first experience with a cappella music. She is so grateful to be part of such a talented group.

Liesl Keller has been singing with Centertonix since its inception in 2017. She teaches elementary music at Kenneth C. Coombs School in Mashpee and is working toward a Master's degree in Choral Conducting. She enjoys accompanying and directing music for local theater productions and is the pianist and organist at St. Peter's Episcopal Church in Buzzards Bay.

Bobbi Langmead is one of many musicians in her family. She has loved singing her whole life. She studied voice in college and has sung in Chamber Singer groups, various concert chorales, a female a capella group, Mastersingers by the Sea, music theater shows, and most recently a bluegrass band. She loves teaching Fourth grade at Mullen-Hall school in Falmouth and incorporating music in her classroom any chance she gets. Bobbi is supported by her husband, Billy, and their two children, Aaron and Cadence. She is thrilled to be part of Centertonix!

Janet Leahy grew up singing in church choirs and chamber music ensembles in high school, and received a vocal scholarship to college. Since moving to Cape Cod 20 years ago, she has been active in several vocal and musical theater groups, including a mid-Cape madrigal group. She also has extensive experience teaching music to children and singing for the elderly. Recently, Janet appeared in Scrooge-The Musical and Elegies for Angels, Punks and Raging Queens at CCftA. In 2019, she and her husband Brian wrote and co-produced the original children’s musical “Astray and the Shelter Dogs,” based Katy McDermott’s book. Janet and Brian are members of the local musical trio Kindred Spirit, along with bassist Laird Boles.

Samantha LeBlanc (Sam) is a rising senior at Sandwich High School. She started singing in church at an early age and has performed with a number of different choirs in school, at church, and as a volunteer. Sam has also performed in many of her school’s plays and musicals, and looks forward to continuing her passion for singing as she pursues further education. She is excited to dive more into the genre of a cappella music and perform with the rest of the group.

Fran Linden - Ever since Fran was a little girl, she sang “Silent Night” to her family. She loves to sing Christmas songs any time of year - even in July. She has been told she has a sweet & clear mid range alto with excellent harmony skills. Fran sang in the Brockton High School’s Concert Choir, has performed with the Norton Singers, and lead worship with the CrossPointe Church band in Mansfield. She and two friends put together a fund-raising album entitled Songs of Praise. The three sang traditional a cappella praise songs on a 10 Track MP3 album. Favorite female artists include Natalie Cole, Julie Andrews, Anne Murray and Adele.

Liam Mahony is the former director of “Half Step Down,” the a cappella ensemble of Sturgis Charter Public School East in Hyannis, a group he started with his son in 2013. Earlier in life, he studied classical piano in college, and sang in several choirs, including Boston’s Back Bay Chorale. After a long break from singing, Liam is thrilled to have the opportunity to sing a cappella with Centertonix. Liam also recently performed as an Apostle in CCFTA's 2018 production of Jesus Christ Superstar, and in the chorus of CCFTA's (2019) Sweeney Todd.

Brian Morris owned and operated Morris Creative Services, an audio production company in North Eastham, MA for 15 years. Most recently, he was a reporter, producer and host for WCAI, the Cape & Islands NPR Station, serving as local host for the programs “Morning Edition” and “All Things Considered.” Brian also is a professional musician, composer, award-winning songwriter, and voice-over artist.

John Quesnel started singing around his mother’s piano at age 3, and hasn’t stopped since. He sang with, and was the emcee for the Narragansett Bay Chorus in Providence for 20 years, competing in International competitions in 11 of those years. He has sung in many quartets, most notably the “P’s & Q’s” with his wife Linda and another couple, who for 10 years entertained audiences from Maine to Florida. Prior to retiring, John was an actuary and principal in a pension consulting firm.

Linda Quesnel is fortunate to have been born into a music-loving family. Everyone played at least one instrument, and singing harmony was part of every family gathering. She has sung in 6 competitive choruses, and sang in the regional champion quartet,”Jazz Reunion.” She also sang for 10 years with her husband in the medal-winning mixed a cappella quartet,”P’s & Q’s”. Linda is a retired Marriage and Family Therapist, and finds singing time to be her personal therapy.

Steve Stein, musical director, has nearly 50 years of a cappella group experiences, from his high school barbershop quartet, to singing with and directing the MIT Logarhythms, to singing with the Cape Cod Surftones and the quartet “Take the Fifth”. In his years of choral singing, he has sung with the Tanglewood Festival Chorus, the New World Chorale and Chorus Pro Musica. He has also appeared in many musical theater productions including Scrooge and Pirates of Penzance at CCftA and most recently as Counsel for the Plaintiff in Eventide's production of Trial by Jury.

Robb Topolski was finally allowed to begin music lessons as soon as he got to G in learning the alphabet, even though he still couldn't reach the pedals on mom's Hammond organ. From pre-teens to the present day, from religious to irreverent, from Guam to Washington DC, he has over 40 years of vocal experience including school and church choirs, the Tualatin Valley Harmony Masters, Route 26, Intel Voice Connection, One Bit Parody, Spare Time, Bridge Town Sound, the Alexandria Harmonizers, the Cape Cod Surftones, and Take the Fifth quartets. Robb lives with his also-musical husband, Dennis, in Yarmouth Port.